Will this plug straight into my existing wiring harness?

It's designed to bolt into OEM mounting points, but electrical connector compatibility depends on your specific model year and trim. Test-fit the connector before final installation to confirm it seats fully.

Do I need to remove the door panel to install this?

Typically no — the mirror bolts on from the outside. You may need basic hand tools. Consult your service manual for exact bolt locations and torque specs on your model.

What if the mirror arrives with a scratch or the heating doesn't work?

Inspect it immediately when it arrives. Contact support with photos within the return window if there's visible damage or the heating element doesn't respond when power is applied.